20092009

素因数分解:

$7^2\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1$

素因数の和:265

約数の個数: 24

約数和(自身を含む): 24447528

約数和(自身を除く): 4355519

約数列:

[1, 7, 41, 49, 73, 137, 287, 511, 959, 2009, 2993, 3577, 5617, 6713, 10001, 20951, 39319, 70007, 146657, 275233, 410041, 490049, 2870287, 20092009]

約数ペア:

[(1, 20092009), (7, 2870287), (41, 490049), (49, 410041), (73, 275233), (137, 146657), (287, 70007), (511, 39319), (959, 20951), (2009, 10001), (2993, 6713), (3577, 5617)]